Giant salamanders, some growing up to 5-feet in length, face a barrier of dams in Japan, built to control flooding. Now it's hoped a new system will help these giant amphibians get upstream past the dams to lay their eggs.

WARNING: This video contains graphic footage of eye surgery. Viewer discretion is advised. In 1949, Jo Ann Lewis began losing her sight to retinis pigmentosa, a degenerative disease that destroys light-detecting cells in the eye. Today, microelectronic implants have allowed her to recapture a vestige of vision.

For the first time, a large Pacific barreleye fish - complete with transparent head - has been caught on film by scientists using remotely operated vehicles at the Monterey Bay Aquarium Research Institute. The deep-sea fish's tubular eyes pivot under a clear dome.

The hard to reach "plush toys" on Papua New Guineau have been outfitted with "Crittercams" for the first time. The breathtaking treetop footage is already solving tree kangaroo mysteries, researchers say.

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